Steam circulation heating plant



Aug- 7, 1934 A. MIERsBE 1,969,181

STEAM CIRCULATION HEATING PLANT Filed April 15, 195i Inventor Patented-Aug. 7, 1934 Y n v UNITED STATES PATENT STEAM CIRCULATION HEATING PLANT Adolf Miersbe, Cologne-on-the-Rhine, Germany Application April 15, 1931, serial No, 530,380

1 claim. (ci. 237-1) In steam heating installations in which the matic View of a steam circulation heating instalsteam is in constant circulation, and this steam, lation equipped with an ejector according tothe at one point in its circuit, is impelled round the invention, the ejector, with the condensed 'water circuit by means of an injector or jet pump opercollector and the return pipes, being shown on a l 5 ated by live steam from an external source, which larger scale and in sectional elevation, while the 60 gives up its heat in the steam circulation heating individual heating elements, ribbed tubesfor explant, an important part is played not only by the ample and heated drurnsor tanks with their sup,- regulating of the jet pump but also by the comply pipes, are shown in outside elevation. The pletel separation vof water and air from the steam plant is only to be regarded as a closed-circulaflowing through the various pipes and heating tion heating installation in the sense that into the 65' untvs- It iS abOVe all important, in Steam heating return piping there only enters the steam nowing installations of the aiorementioned kind, by a back from the heating units, and not exhaust skilled construction of the jet pump, in conjuncsteam or low-pressure steam from other steam tion withA other auxiliary means to be tted into generators.

15 the heating plant, to prevent large accumulation The live steam coming from any convenient 70 of condensed water, and to prevent accumulations source of heat, e, Steam boiler for example, enters of air being formed from the air that all heating the steam circulation pipeA system at v1, crosses steam ordinarily carries with it. Such accumulaover a pocket-like structure 3 and under a dometOnS 0f Water and air not Only Obstruet the free like structure 2, and then flows through a tubular passage of the heating steam within the circulaelement 4 or a branchtubular element 8; which 75 tory system but also impair the delivery of heat to lead respectively to the'A regulating and shut-off the individual heating elements, ribbed tubes for members 6 and 8a 0f the jet pump '7, t 'I example. t The pocket-like structure 3 is for the purpose This object is attained according tothe invenof separating any water that may be present in l V tion by providing, at least at the entrance points the live steam. The water deposited is removed 80 of the live steam and of the low pressure steam from time Ato time through a cock 3a. In the 110 be utilized thereWth, aud preferably alSO at dome 2, any air carried along by the live steam is. another suitable'point in the circuit of the steamseparated from the latter. An air-relief cock 221L heating system, means which bring about, besides or a valve leads 'the air thus separated into the T a thorough separation 0f Water, alSO the equally atmosphere from time to time or continuously. S5 mpertant Separaten 0f air from the steam, and The greater part of the steam, freed from water also by exerting, in place of the single-acting oonand air, collects in the chamber 5 of the jet pump struction of the jet pump hitherto provided, a sub- '7, while a smaller quantity passes through a pipe stantially stronger action, and in particular a 8 to the stop valve 8a. From the chamber 5 the l double action thereof, upon all the exhaust or steam flows, in quantities determined by the 90 low preSSure Steam entering the SYStem, the pOS- position of the valve 6, into the nozzle-like tapersibility of extensive differentiation of the effects ing cavity 10 of the jet pump cone 12, and leaves of the jet regulation being however retained. the mouth thereof at a high speed in the form` Y The arrangement 0f the J'et Dump iS then Such of a jet, exerting a suction and accelerating action t '540. that the live steam can enter the nozzles of the upon a quantity of low pressure or exhaust steam 95 jet Dump at WO different points, so that it is which enters an annular chamber 11 in the jet feasible, according t0 the quantities of heat pump from a pipe 26 openinginto the interior of needed, to allow the live steam to pass through the conical Wall 9a of the-chamber 11.

the ejeCtOr either by 011e Path Only 0r by 'GWG This action is considerably reinforced if at the -.45 paths, in such a way that when the live steam same time the steam ilowing through the branch T00 only passes through one nozzle path of the ejecpipe 8, after the valve 8% is opened, enters the tor the acceleration of the circulation and the annular chamber 9, which is formed by a nozzledelivery of heat is not so great as whenit passes like part 12a of the jet pump 7, which surrounds through the el'eC'OI by WO HOZZ'le paths Smulthe part 9a at a suitable distance. 1 The maximum l taneously, as in the latter case it exerts a parattainable acceleration is thereby exerted upon 105 ticulariy powerful accelerating action upon the the exhaust steam in the intermediate nozzle or used steam. In this Way the action of the ejector annular chamber 11, .which is already influenced can be strengthened or weakened according to the by the injector action of the nozzle 10, vany de- Y varying external temperatures. sired variation in the relative quantities and 551 The accompanying drawing shows a diagramvelocities of the steam entering through the pipes lzo 1, 8 and 26 being attainable by adjusting the' valves 6 and 8a.

From the jet pump the steam, freed from water and air, flows at a high speed, owing to pressure imparted to it by the boiler, through a distributor pipe 13 to the individual heating units, for instance to ribbed tubes 14 and 14a, and to drying cylinders 15 and- 15a and the like. Valves 17a, 17h, 17c and 1'7d provided in the` inlet pipes 16a, 16b and 16c enable the quantities entering the respective pipes to beregulated.

The steam leaving the heating units 14, 14a, 15 and 15aL passes through pipe units 18, 18a, 18b and 18c into a return pipe 19.

This return pipe Vaccording to the invention may consist of separate pipes opening intoa common Water separator 22, and corresponding in number to the individual heating units, in which case, in order to obviate losses of heat, the arrangement might be such that all these pipes were enclosed, concentrically or eccentrically in relation to one another, as a nest of tubes a common jacket pipe.V Y

A preferred arrangement, however, is to employ as a return pipe a single pipe 19 and to divide it into a number of compartments by means of partitions 19a, the return pipes 18, 18a, 18b and 18c being so connected to the compartments of the pipe 19 as to ensure conditions that .are as equal as possible asv regards temperature and steam pressure., Y i f vIf for example the steam pressure `in the heating units 14a and-15 amounts to one atmosphere and that in the heating units 14 and 15a to two atmospheres, the compartment 19b of the pipe 19 Will preferably beconnected With the units 14 and 1,5%, and the compartment 19C, with the units 14e and 15, but provision Willvnevertheless be made, by arranging a common air-collecting dome 20, with air-relief valve 20a, yfor a certain equalization of the pressures in the pipe 19, at the same time also effecting a further removal of air from the returning steam flowing through the latter;

. Now the return steam iloWs out of the pipe 19 vinto a common connecting piece 21 between the pipeline '.19 and the separator and collecting chamber 22. Y

It is'k advisable to construct the .passages 21a and21b ofthe connecting member 21 as nozzles, in order to increase the velocityof the return steam at its entrance into the collector 22, and to arrange in front of the nozzle outlets 21c and 21d inclined baiile plates 23a and 23b on a holder 23 in the chamber 22 in order likewise to promote a further separation of Water from the entering steam. The Water accumulating in the chamber 22 falls to the bottom and flows away into a steam trap 24, which is connected with the chamber 22, and from which. it is Withdrawn or discharged at 25. l

To the top of the collector 22 is connected a pipe 27', With a further air relief-dome 27a and a Water pocket 27h, the accumulations of Water passing through an aperture 2'7d into the collector-22, While'an air-relief valve 2'7c periodically or continuously allows the accumulating air to escape to the atmosphere. The return steam or exhaust steam thus freed from water and air now passes through the pipe 26, and the non-return valve 28 interposed therein, and through an inlet 29 yinto the intermediate nozzle 11, of the jet pump ,7, sorthat the circuit is lclosedyand the series of `operations already `described continues indefinitely.

i What I. claim is:.-

A steam circulation heating installation, comprising a pipe linefor supplying live steam, a jet pump interposed in the pipe line, means for regulating the flow of live steam through the jet pump, heating units connected to the pipeline for-.utilizing the. steam suppliedby the jet pump for heating purposes, a return pipe line forv the usedy steam from. .the heating units, aV chamber interposed 'in the return pipe line,v `a baffle` plate in the chamber, afdome surmounting the ,cham` ber and. communicating with the interior there` of, and a secondr baffle platevin the dome,v thereturn pipe having its cross sectiontapered like a nozzleto increase the velocity of the used steam at the point Where it enters the chamber and being directed'` towards the bafe plate in the chamber for the interruption of condensate, and the baille plate in the dome being adaptedv to con? strain steam Yleaving the chamber to pass up into and then down out ofthe dome for the ref moval of air from the steam, the return piper 

